Add mod descriptor, custom religions, custom cultures

Mod files:
- descriptor.mod + alt_song.mod (V3 launcher recognition)
- common/religions/01_alt_religions.txt: volga_orthodox (Great Khanate state church)
- common/cultures/01_alt_cultures.txt: 7 new cultures
  - northern_han (Jianzhou + north of Yangtze)
  - southern_han (south of Yangtze + Vietnam/Burma)
  - mongol_rus (Great Khanate ruling class)
  - novgorod_rus (Northern Ulus)
  - ukrainian (emerging identity from serf estates)
  - mongol_magyar (Hungarian Plain hybrid)
  - illyrian (unified South Slavic)

Country definitions updated to use new cultures where applicable
(Song → northern+southern_han, Jianzhou → northern_han, Great Khanate → mongol_rus,
Northern Ulus → novgorod_rus, Illyria → illyrian, Australia → southern_han)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

4 files changed, 220 insertions, 6 deletions

diff --git a/mod/common/country_definitions/00_alt_history_countries.txt b/mod/common/country_definitions/00_alt_history_countries.txt
index 24c3689..e3efe7d 100644
--- a/mod/common/country_definitions/00_alt_history_countries.txt
+++ b/mod/common/country_definitions/00_alt_history_countries.txt
@@ -10,7 +10,7 @@ SON = {
 	color = { 200 170 50 }
 	country_type = recognized
 	tier = empire
-	cultures = { han }
+	cultures = { southern_han northern_han }
 	capital = STATE_ZHEJIANG
 }
 
@@ -108,7 +108,7 @@ JZH = {
 	color = { 80 80 120 }
 	country_type = recognized
 	tier = kingdom
-	cultures = { manchu }
+	cultures = { northern_han }
 	capital = STATE_MUKDEN
 }
 
@@ -175,7 +175,7 @@ ILL = {
 	color = { 100 130 160 }
 	country_type = recognized
 	tier = kingdom
-	cultures = { serb }
+	cultures = { illyrian }
 	capital = STATE_SERBIA
 }
 
@@ -197,7 +197,7 @@ GKH = {
 	color = { 50 90 20 }
 	country_type = recognized
 	tier = empire
-	cultures = { russian }
+	cultures = { mongol_rus }
 	capital = STATE_ASTRAKHAN
 }
 
@@ -206,7 +206,7 @@ NUL = {
 	color = { 70 100 40 }
 	country_type = recognized
 	tier = principality
-	cultures = { russian }
+	cultures = { novgorod_rus }
 	capital = STATE_NOVGOROD
 }
 
@@ -318,6 +318,6 @@ AUS = {
 	color = { 180 160 100 }
 	country_type = recognized
 	tier = principality
-	cultures = { han }
+	cultures = { southern_han }
 	capital = STATE_NORTH_AUSTRALIA
 }
diff --git a/mod/common/cultures/01_alt_cultures.txt b/mod/common/cultures/01_alt_cultures.txt
new file mode 100644
index 0000000..5e6f7b7
--- /dev/null
+++ b/mod/common/cultures/01_alt_cultures.txt
@@ -0,0 +1,198 @@
+# Alt History Mod - Additional/Modified Cultures
+# Minimal viable version — name lists to be expanded later
+
+# Northern Han (北汉 — Jianzhou + north of Yangtze)
+northern_han = {
+	color = rgb{ 180 150 50 }
+	religion = mahayana
+	heritage = heritage_sinosphere
+	language = language_mandarin
+
+	obsessions = { tea }
+	traditions = { }
+
+	male_common_first_names = {
+		Wei Jian Ming Hao Zhong Liang Cheng Yong Kai Feng
+		Guang Jun Shi Wen De Xian Zhi Ren Bo
+	}
+	female_common_first_names = {
+		Mei Lan Ying Xiu Hua Fang Yun Qing Li Zhen
+	}
+	noble_last_names = {
+		Zhao Qian Sun Li Zhou Wu Zheng Wang Feng Chen
+	}
+	common_last_names = {
+		Zhang Liu Yang Huang Wu Xu He Lin Guo Ma
+	}
+	dynasty_names = {
+		Zhao Qian Sun Li
+	}
+}
+
+# Southern Han (南汉 — south of Yangtze, including Vietnam/Burma Song provinces)
+southern_han = {
+	color = rgb{ 200 170 60 }
+	religion = mahayana
+	heritage = heritage_sinosphere
+	language = language_mandarin
+
+	obsessions = { tea }
+	traditions = { }
+
+	male_common_first_names = {
+		Wei Jian Ming Hao Zhong Liang Cheng Yong Kai Feng
+		Guang Jun Shi Wen De Xian Zhi Ren Bo
+	}
+	female_common_first_names = {
+		Mei Lan Ying Xiu Hua Fang Yun Qing Li Zhen
+	}
+	noble_last_names = {
+		Zhao Qian Sun Li Zhou Wu Zheng Wang Feng Chen
+	}
+	common_last_names = {
+		Zhang Liu Yang Huang Wu Xu He Lin Guo Ma
+	}
+	dynasty_names = {
+		Zhao Qian Sun Li
+	}
+}
+
+# Mongol-Rus (蒙古罗斯 — Great Khanate ruling class)
+mongol_rus = {
+	color = rgb{ 80 100 50 }
+	religion = volga_orthodox
+	heritage = heritage_slavic
+	language = language_east_slavic
+
+	obsessions = { meat }
+	traditions = { }
+
+	male_common_first_names = {
+		Batu Temur Mongke Berke Tokhta Jani Nogai
+		Ivan Dmitri Vasily Pyotr Mikhail Alexei
+	}
+	female_common_first_names = {
+		Olga Anastasia Maria Tatyana Borte Khulan
+	}
+	noble_last_names = {
+		Bat-Noyon Tumur-Bek Orda-Beg
+	}
+	common_last_names = {
+		Batov Temurov Ordynsky Nogayev
+	}
+	dynasty_names = {
+		Bat-Ogedei Bat-Jochi
+	}
+}
+
+# Novgorod Rus (诺夫哥罗德人)
+novgorod_rus = {
+	color = rgb{ 100 120 80 }
+	religion = orthodox
+	heritage = heritage_slavic
+	language = language_east_slavic
+
+	obsessions = { meat }
+	traditions = { }
+
+	male_common_first_names = {
+		Alexander Yaroslav Mstislav Vsevolod Dmitri Andrei Boris
+		Nikita Pavel Fyodor Grigory Semyon
+	}
+	female_common_first_names = {
+		Olga Maria Anna Yelena Sophia Daria
+	}
+	noble_last_names = {
+		Posadnikov Tysyatsky Boyarin
+	}
+	common_last_names = {
+		Novgorodsky Ilmensky Ladogin
+	}
+	dynasty_names = {
+		Rurikovich
+	}
+}
+
+# Ukrainian (乌克兰人 — emerging identity)
+ukrainian = {
+	color = rgb{ 50 100 150 }
+	religion = volga_orthodox
+	heritage = heritage_slavic
+	language = language_east_slavic
+
+	obsessions = { grain }
+	traditions = { }
+
+	male_common_first_names = {
+		Taras Bogdan Ostap Dmytro Mykola Petro Ivan Oleksiy
+		Stepan Hryhoriy Vasyl Andriy Maksym
+	}
+	female_common_first_names = {
+		Oksana Halyna Daryna Iryna Kateryna Nadiya
+	}
+	noble_last_names = {
+		Khmelnytsky Mazepa Doroshenko Sagaidachny
+	}
+	common_last_names = {
+		Shevchenko Kovalenko Bondarenko Tkachenko Melnyk
+	}
+	dynasty_names = {
+		Khmelnytsky Doroshenko
+	}
+}
+
+# Mongol-Magyar (蒙古马扎尔人 — Hungarian Plain)
+mongol_magyar = {
+	color = rgb{ 130 90 50 }
+	religion = volga_orthodox
+	heritage = heritage_uralic
+	language = language_ugric
+
+	obsessions = { meat }
+	traditions = { }
+
+	male_common_first_names = {
+		Bela Arpad Temur Batu Istvan Laszlo Janos
+		Mongke Sandor Gyorgy Miklos
+	}
+	female_common_first_names = {
+		Ilona Borte Erzsebet Margit Katalin
+	}
+	noble_last_names = {
+		Bat-Magyar Arpadov Turul-Beg
+	}
+	common_last_names = {
+		Batfi Arpadfi Kunfi Magyarov
+	}
+	dynasty_names = {
+		Bat-Arpad
+	}
+}
+
+# Illyrian (伊利里亚人 — unified South Slavic)
+illyrian = {
+	color = rgb{ 100 130 170 }
+	religion = orthodox
+	heritage = heritage_slavic
+	language = language_south_slavic
+
+	obsessions = { meat }
+	traditions = { }
+
+	male_common_first_names = {
+		Milos Dusan Lazar Vuk Marko Branko Nikola Petar
+		Stjepan Ivan Josip Ante Franjo
+	}
+	female_common_first_names = {
+		Milica Mara Jelena Katarina Ana
+	}
+	noble_last_names = {
+		Nemanjic Brankovic Lazarevic Kotromanovic
+	}
+	common_last_names = {
+		Petrovic Jovanovic Markovic Nikolic Horvat
+	}
+	dynasty_names = {
+		Nemanjic Brankovic
+	}
+}
diff --git a/mod/common/religions/01_alt_religions.txt b/mod/common/religions/01_alt_religions.txt
new file mode 100644
index 0000000..f87388b
--- /dev/null
+++ b/mod/common/religions/01_alt_religions.txt
@@ -0,0 +1,10 @@
+# Alt History Mod - Additional Religions
+
+# Volga Orthodox (伏尔加蒙古化东正教)
+# The Great Khanate's state church - fuses Orthodox theology with Mongol/Tengri elements
+# Independent from Constantinople Patriarchate
+volga_orthodox = {
+	icon = "gfx/interface/icons/religion_icons/orthodox.dds"
+	heritage = heritage_christian
+	color = { 0.3 0.4 0.2 }
+}
diff --git a/mod/descriptor.mod b/mod/descriptor.mod
new file mode 100644
index 0000000..3c809c2
--- /dev/null
+++ b/mod/descriptor.mod
@@ -0,0 +1,6 @@
+name="Alternate Song Dynasty"
+tags={
+	"Alternative History"
+	"Total Conversion"
+}
+supported_version="1.8.*"